Remove unused Env#readers
Remove unused Env#readers

Readers were removed in 3203059b3800fafe3a003e6b61ab376c79e8a3da

rom-rb/rom,kwando/rom,rom-rb/rom,dekz/rom,endash/rom,pvcarrera/rom,denyago/rom,jeremyf/rom,dcarral/rom,rom-rb/rom,cored/rom,vrish88/rom,Snuff/rom,pxlpnk/rom